The following pipeline leads to an invalid working directory /home/xxx/C:\workspace\yyy\node-test\foo when executing the sh step. This is a regression since 1206.v8a_d5f86e336b

node("WINDOWS_BUILD") {
    cleanWs()
    bat "mkdir foo"
    dir("foo") {
        node("UBUNTU_BUILD")

    }
}

java.io.IOException: Process working directory '/home/xxx/C:\workspace\workspace\kuc2hi\node-test\foo' doesn't exist!
at hudson.Proc$LocalProc.<init>(Proc.java:252)
at hudson.Proc$LocalProc.<init>(Proc.java:223)
at hudson.Launcher$LocalLauncher.launch(Launcher.java:997)
at hudson.Launcher$ProcStarter.start(Launcher.java:509)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:1398)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:1340)
at hudson.remoting.UserRequest.perform(UserRequest.java:211)
at hudson.remoting.UserRequest.perform(UserRequest.java:54)
at hudson.remoting.Request$2.run(Request.java:376)
at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at hudson.remoting.Engine$1.lambda$newThread$0(Engine.java:125)
at java.base/java.lang.Thread.run(Thread.java:829)
Finished: FAILURE